| 单词 | alkaline earth |
| 释义 | > as lemmasalkaline earth alkaline earth n. Chemistry (originally) an earth (earth n.1 16) which is alkaline; (in later use) any of the strongly basic oxides of the alkaline earth metals; (also) = alkaline earth metal n. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > specific elements > oxygen > [noun] > compounds > oxides alkaline earth1716 oxide1788 earth1863–79 nickel spinel1961 1716 W. Oliver Pract. Diss. Bath-waters iv. 32 That there is also an Alkaline Earth too, that mixes with these Waters, is demonstrable from the Bath-Sands. 1793 Trans. Amer. Philos. Soc. 3 18 This concrete is not an alkaline earth, as it is not affected either by the vitriolic or vegetable acids. 1816 H. Davy in Q. Jrnl. Sci. & Arts July 263 A new point of analogy between the alkalies and the alkaline earths. 1875 R. Hunt & F. W. Rudler Ure's Dict. Arts (ed. 7) I. 15 The acetate of silver gives no acetone; whilst those of the alkaline earths yield chiefly acetone or marsh gas. 1940 G. H. J. Adlam & L. S. Price Higher School Certificate Inorg. Chem. (ed. 2) xiii. 83 The alkali metals are the most basic elements; they are followed by the alkaline earths, barium, strontium and calcium, which are almost as strongly basic. 1957 G. E. Hutchinson Treat. Limnol. I. viii. 553 CO2 lost from alkaline earth carbonates. 1993 N.Y. Rev. Bks. 4 Nov. 52/4 ‘Soda’ and ‘potash’, the alkalis, had been regarded as elements by Lavoisier, as had the alkaline earths—lime, magnesia, strontia, and baryta. < as lemmas |
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